Will a Nc23 engine from a later nc29 work on earlier bike

Vengy1 · Post by **Vengy1** » Tue Jun 11, 2019 6:16 pm

I’ve got a later nc29 engine not sure of exact year and a cbr400rr hurricane which has destroyed its engine. Will the later engine work on the carbs and electrics of the earlier bike ? Any help is greatly appreciated

Post by **sa.racing** » Wed Jun 12, 2019 11:20 am

Think the engine mounts are different if memory serves me correct,

best bet would be to sell the NC29 as there still worth a few quid and pick yourself up an NC23 motor (sure there's one for sale in the for sale section on here)

Vengy1 · Post by **Vengy1** » Wed Jun 12, 2019 5:05 pm

Thanks for the reply

Found the engine no. Reference in the Haynes manual and it would appear I have another j series engine which should just bolt straight in and not a nc29 engine. The silver cases instead of gold put me off as I didn’t have a engine number reference. Thanks for the help tho

Post by **sa.racing** » Wed Jun 12, 2019 5:28 pm

No worries mate,

Easiest way to tell is the NC23 engines have fins on the crank cases where as the NC29 engines have a smooth crank case.

Vengy1 · Post by **Vengy1** » Wed Jun 12, 2019 5:36 pm

The cases r also finned

All the mounts line up and the engines just been cleaned for putting in but the integrity of said engine is unknown as of yet so fingers crossed

lol it turns over with compression and its got oil in it that isn’t emulsified which means nothing lol

Post by **CB1pod70** » Thu Jun 13, 2019 10:44 am

sa.racing wrote: ↑
Wed Jun 12, 2019 5:28 pm
No worries mate,

Easiest way to tell is the NC23 engines have fins on the crank cases where as the NC29 engines have a smooth crank case.

Also the NC23 has a water outlet on the back of the cylinders going to the water pump where as the NC 29 has the outlet on the front of the cylinders

Vengy1 · Post by **Vengy1** » Fri Jun 14, 2019 8:08 am

The engine is in

Thanks to everyone who replied it was appreciated greatly ! The key has been put away ‘safe’ 🤬 is there a way of bridging the pins in the ignition connector to get the ignition on please ? As I don’t want to ruin the ignition as it’s original and the key will turn up the second I screwdriver it

Thanks Alex

Post by **CB1pod70** » Fri Jun 14, 2019 10:40 am

If you disconnect the ignition barrel you you can make up a bridging wire to sit in the connector from the loom. You need to bridge the red & red/black wires. Make sure you use wire that is the same gauge or thicker than the red wire and just use some crimp electrical connectors from Halfords or the like.

Vengy1 · Post by **Vengy1** » Fri Jun 14, 2019 11:10 am

Thanks for the reply that’s a massive help and very appreciated

Will a Nc23 engine from a later nc29 work on earlier bike

Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike

Re: Will a Nc23 engine from a later nc29 work on earlier bike